diff --git a/comfy_api/latest/_input/video_types.py b/comfy_api/latest/_input/video_types.py
index 5d95dc507..2b0e7c3a5 100644
--- a/comfy_api/latest/_input/video_types.py
+++ b/comfy_api/latest/_input/video_types.py
@@ -2,7 +2,6 @@ from __future__ import annotations
 from abc import ABC, abstractmethod
 from typing import Optional, Union
 import io
-import av
 from comfy_api.util import VideoContainer, VideoCodec, VideoComponents
 
 class VideoInput(ABC):
@@ -80,6 +79,7 @@ class VideoInput(ABC):
             Container format as string
         """
         # Default implementation - subclasses should override for better performance
+        import av
         source = self.get_stream_source()
         with av.open(source, mode="r") as container:
             return container.format.name